Improvement in paper-bag machines



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M. E. KNIGHT. Paper-Bag Machine. No. 220,925. Patented Oct. 28, 1879.

. 6'Sheets-Sheet 3.

M. E. KNIGHT.

Paper-Bag Machine. No. 220,925. Patented Oct. 28, |879.

N. FEYERS, PHOTO-LUMUGRAPHER. wA'smNGToN. D C.

6 Sheets-Sheet 4.

M. E. KNIGHT. Paper-Bag Machine. No. 220,925. Patented Oct. 28, 1879.

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6 Sh'eets-Sheet 5 M. E.'KNIGH.T. Paper-Bag Machine.

Patented Oct. 28, 1879.

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N-PEIERS. PHOYO-LITHDGRAPNER, WASmNGToN D C NITED STATES PATE-NT QFFIGE.

MARGARET E. KNIGHT, OF SPRINGFIELD, MASSACHUSETTS7 ASSIGNOR TO THEEASTERN PAPER BAG COMPANY.

IMPROVEMENT IN PAPER-BAG MACHINES.

Specification forming part of Letters Patent No. 220,925, dated October28, 1879; application filed i July 10, 1879.

To all whom it may concern:

Be it known that I, MARGARET E. KNIGHT, of Springfield, county ofHampden, State of Massachusetts, have invented an Improvement inPaper-Bag Machines, of which the following description, in connectionwith the accompanying drawings, is a specication.

This invention relates to machines for making paper bags of theSatchel-bottom class, and is an improvement on the machine representedin United States Patent No. 116,842, granted to me July 11, 1571, towhich reference may be had.

The paper from a reel is formed into a tube and pasted together beforebeing folded for the bottom of the bag.

This my present invention relates, chiefly, to the main folding-bladeand an auxiliary feeding-blade having certain time and order of motionrelatively to the linger and side-folders, as hereinafter described,whereby the bottom of the bag is completed, except as to its last fold,in an easy and rapid manner, without tearing or straining it out ofshape; also, to the combination, with thc side-folders, of pastingmechanism to apply paste to the said side-folders, they applying pasteto one of the overlapping corners of the bagbottom.

Figure 1 represents, in top view, enough of a paper-bag machine toillustrate my present invention; Fig. 2, a side elevation thereof; Fig.3, a longitudinal vertical section on the line w w, Fig. l; Fig. 4, aView of the delivering end of the machine; and Figs. 5, 6, 7, 8, 9, 10,1l, and 12 are detail plan or top views and longitudinal sections ofthevarious blades, folders, and -iinger constituting the bottomformingdevices in the several different positions they will occupy when formingthe bottom of the bag, as will be hereinafter fully described. Fig. 13is a detail of the gearing herein employed at the left-hand side of themachine; and Fig. 14, a detail showing the rst or diamond fold, thesecond or cross fold, and the third or finishing fold.

The frame a is of suitable shape to sustain the working parts. y

The'former b, abo'ut which the tube of paper is to be formed, will beprovided with a follower, such as described in my said patent, or

such as described in United States Patent No. 215,578, it serving tokeep the end of the tube open, the end ot' the follower co-operatingwith the finger, all as described in either of the said patents, andneed not therefore be herein further described.

The tube-feedin g rollers c d are arranged to bear upon the under andupper sides of the pasted tube to move it forward over the former b andupon the end of the finger c, and are driven intermittingly to permitthe tube to rest at the proper times during the folding of the bottom ofthe bag and While severing the tube into bag-lengths, all as usual.These rollers will be grooved annularly for the passage of the follower,all as usual.

In this present embodiment of my invention power to drive the machine isapplied to the handle e on a shaft or stud, j', havinga pinion, g, whichengages and rotates a toothed gear, h, that through a train of gear, 2 3at 5 6 `7, turns the shaft t', which has upon it the cam 8, that movesthe lever j and reciprocates the frame 7c, which carries thetube-severing blade orv knife l, which may be made to operate asdescribed in either of the two patents referred to, no claim beingherein made to any part of the said tube-Severin g mechanism. This sameshaft t has a cam, m, that moves a link, 9, adjustably connected with anarm, 10, of arockshaft, n, operated in one direction by a spring, 11,and having arms 12, with which are connected links or rods 13, which areat their other ends jointed to the end pieces, 14, ofthe auxiliaryfeeding-blade o, the end pieces being tted to move in curved guideways15, open at their lower ends, the connection of the rods or links 13with the said pieces 14 being by a pivot or pin, as at 16, substantiallyin the line of the acting front edge of the said blade o, so that as theforward edge of the blade o strikes the paper tube, and the blade passesout from the guideways 15, the said' blade will tip and lie flat uponthe paper, so as to readily pass under the main foldingblade p andbeyond it, as will be hereinafter described, the blade o being held downupon the bed q by the springs r acting upon the rods 13.

The gear 3 is secured upon the shaft t, ex-

tended across the machine, alid the opposite end of the shaft iliade asa crank, le', alnl is provided with a pinion, 17, that engages anintermediate, 18x, having its shaft 1n slipported by liiiks 2U, the saidiiiterliiediate driving the feed-rollers interniittingly throligli thesystem of gearing showll ill Fig. 2, all of usual construction, and notclaimed.

The toothed gear Il, through a traili of gear, c w .1, operates thecalii-sllaft y, having lipoii it; cams 21, which strike rollers onal'nis 22, extended backward from a cross-liead, 23, (see Figs. 3, 4,)having other arlns 24, titted in vertical guideways 25, attached tofranie a, the said arms having notched plates, for a purpose hereinafterdescribed.

The Canis 21 lift the cross-head, and a spring, 27, depresses it. Thiscross head Ji luis placed loosely upoli it sliding heads 2" 2f),provided with posts itt 3l, to the upper ends of which are secllred theside folders or pressers a b. This shaft y has a cam, 3;', which actsupon a roller, 33, ot' a lilik, 34, connected with the short arms 35 oftwo levers, liti, pivoted on bar 36x, aiid provided with lolig slots 37,which receive pills or projections .3S of the sliding heads 28 21), thevibration of the levers 36 acting to move the sliding heads on thecross-1iead, alid consequently also moving the side folders or presserstoward and l`roin each other ill unison, the vertical liiotioli of thecross-liead raising aild lowerilig the side folders or pressers at theproper tiliies, as will be hereinafter described.

The link34 isdrawii down by the spring 39.

The rods 40, supported b v bar LNV, have at their lower ends helicalfills 4l, (see Figs. 3, 4,) which are embraced by the ilotclied portionsof the arms 21 of the cross-head, alld as the latter is raised alidlowered the rods 4t) have imparted to thelii a rotary reciprocatinginotion sucient to move the side-pasters 4. froln the paste-rollers 43(there, in practice, heilig one paste-roller alid paste-box, 44, ateaeli side of the machine) to a position in contact with the top surfaceof the side-folders a Il', and apply paste to said folders, so that thcfirst corner-fold laid over upon the said sidefolders by the secondforward movement ot' the main folder p will be pasted at its uliderSide, the side-folders being vlithdrawn from below said folded oroverlapping portion laterally.

The paste-roller 43 is rotated interinittiugly by a. pawl, 45, at theelld of a spring'arln, 46, actuated in one direction by a lug, 47, atthe rear of pinion 48k@ one of the bagdelivering rollers 49, they be'fgggeared together by pillA ions 50, so as to tu'rn at the salue rate ofspeed at which the first roller of the pair is rotated by the action ofthe toothed gear 5l, wlliell derives its niotoli from the pinion ir. Thepinion r is secured at one eild of a shaft, 52, provided with a cam, 53,which, by a lilik, 54, is adjustably connected with all arm, 55, of arock-shaft, 56, having at each end arms 57, connected by links 5S witheach end of the main folding-blade p, so that the said blade may turnfreely to move in the curved guideways 59, the said blade rising attimes entirely above the paper upon the bed, alid at times movingbackward alid forward longitudinally lliider the finger c and over theside folding blades or pressers.

The fillger e, pivoted to the foot or holder 6o at the lower end of. avertically-adjllstable rod, Gl, held by the arch a2, is connected bylink 62 with an arm, 63, of a rock-shaft, 64, having at its other end anarm, 65, connected with the upper end of lever 66, having a caln face oiedge, 67, acted upon by a rollcrstud, 68, on a gear, 61), driven bygearing 70 71, the latter gearing beiilg at one end of shaft y. At therear side of this gear 69 is a shouldered calli or tappet, 72, (shown indotted lilies, Fig. 2,) it acting upon a toe or lug of all aiin, 73,forked at its outer end to embrace a guided rod, 74, connected at itsupper end with the lever 75, that lifts the final-foldiligblade 76,which acts upon the paper after the dialilolid fold has been formed, andforms the final fold for the Img-bottom, passing the paper into the biteof the delivering-rollers 49, between which the completed bag isdelivered from the macliiile.

The rod 74 is guided at its lower end by a guide, 77, which alsosupports a spiral spring, 7S, that sllrloiliids rod 74, and bears thearln 73 up against the tappet 72, the arln 73 restillg against ashoulder, 80, of the said rod. As the arm 73 compresses the spring 78the rod 74 is drawn down; but as the shoulder of the tappet 72 passes aprojection on arlli 71S the spring throws it up alid quickly depressesthe tinal folding-blade, 76.

The cams 53 m and 21 32 will be of sllch shape alid so tilned, the onewith relation to the other, as to give to the niaili folding-blade aiidauxiliary feeding-blade aiid side-folders the movelileiits and rests inthe time alid order liereiliafter descrilied ill the operation ofthemachine.

I desire it to he understood that I lay no claim to the special gearingand driving parts liereili described, alid in practice I may varytlierefrolu as may be found desirable to attaill the most direct andpositive movelnelits with fewest parts alid least friction.

Operation: Referring to Figs. 2 and 3, the inali folding and auxiliaryfeeding blades p o alld side-folders a b are shown lifted as they willbe while the open end of the paper tube is fed upon the point of thelinger c. When the tube has beell fed upon the finger for the properdistance, the inain folder p, operated by the cani 53 aiid connectingparts 54, 55, 56, 57, 5S, aiid 5f), is caused to descend lipoll the tubealid pass under the finger, thelatter then, within the open liiouth ofthe tube, being somewhat raised by tlie stud 68 striking the cani part67 of the lever 66, acting to turn back the upper ply ot the tubeforming the diamond fold, (represented at diagram a", Fig. 14 and thenthe auxiliary feeding-blade o (a evice not used in my fornier patent)descends upon the paper tube, which has been severed into a bag-length.In this condition the blades are as in Figs. 5, 6, whereinit will alsobe noticed that the side-folders-liave been moved inward from theiroutermost positions. (Shown in Fig. l1.) Now, the auxiliary blade o, inmoving forward, it being actuated by the links 13,` arms 12, link 9, andcam m on shaft i, turns down substantially parallel with the bed q, andtravels along above and in contact with the paper, passing under themain blade p and finger c, striking the paper at the fold represented bythe line x2 .ft-2, Fig. 14, carrying the said folded part of the paperforward away from the front edge of blade p, and under the side foldersor pressers a b for a distance equal to the distance between the foldedpart m2 and the line of fold w3, Fig. 14, the sidepressers being yetelevated by the cams 21, after which the cams 2l are rotated, permittinga spring, 27, to throw down the sidefolders to clamp the paper, whilethe main folding-blade is, by the cam 53, arms 57, and connections witlrthe said blade, again moved forward partially over the loweredside-folders, thereby forming the first end fold on the dotted lines x3x3, or as at a4, Fig. 14, the blades and folders then being as in Figs.7, 8.

The side-folders, when elevated, were supplied with paste by theside-pasters 42, sothat the under side of th ev paper, folded overthereon by the blade p, becomes pasted.

The folding-blade 19, having reached the p0- sition shown in Figs. 7, 8,now starts back, and as it is being so moved back the sidepressers arealso moved outward, the blade p, in its backward movement, resting, orsubstantiallyso, as it passes from above the sidepressers, theside-pressers in their retreat resting, or substantially so, after theypass out from under the end fold a4. In this condition auxiliaryfeeding-blade o again starts forward, striking the under side of thediamond fold at the line m2 x2, carrying the folded paper along underthe side-folders, whichv are lifted a short distance, and as the bladereaches the position shown in Figs. 9, 10 the final folder, 76, held upby the arm 73, acted upon by the tappet 72, is permitted to descend bythe action of the spring 78 on the rod 74, causing the blade 76 tostrike the leading end of the diamond fold, forcing it into the bite ofthe rollers 49, forming the crease or fold represented by dotted lines.r4 no, forming the fold a5, after which the side-pressers are raised alittle, and the blade o continues its forward movement to assist infeeding the bag. The side-folders then complete their outward movementthrough the action of cams` 32, levers 36, and sliding heads 2S 29, thesaid side-pressers being at the same time elevated through the operationo f cams 2.1, the main folding-blade p during this rising and outwardmotion of the sidepressers being again started back, leaving the bladesas in Figs. ll, l2, wherein the positions of the parts are shown `whenthe blade o is farthest forward, and from the position shown in Figs.10, 1l the blades and folders move back to their starting-points, as inFigs. 1

and 3. Just after the final folder, 76, strikes the paper, theside-folders commence to rise and move outward, as before described.

During the latter portion of the forward movement of blade o in contactwith the paper on the line m2 x2, it acts as a feed for the tubularsevered bag-lengths. The pastors 42 and side-folders leave paste at thepoints x5 of the bag. (See Fig. 14.)

In my former patent the plate knife folder, after passing under thefinger and side-folders, was retracted and again moved forward above theside-folders to complete the iirst corner-fold of the bag-bottom.

By employing the auxiliary feeding-blade to co-operate with the mainblade and side folders or pressers, as described, I am enabled to runthe machine more rapidly with less waste of paper, and feeding thepartially-folded bag by the blade o adds greatly to the certainty of theaction of the machine.

Referring to Fig. 14, it will be noticed that the edges of the paper atthe central part of the diamond fold are parallel.

Itis necessary to keep the bottom square to keep these edges of thediamond fold parallel, or substantially so, and as the finger runs outof the diamond fold and leaves these edges sepa-rated, the holding part60 at the rear of the joint of the finger acts to keep these edges inproper place and not permit Ythem to approach each other nearer at oneend of the diamond fold than at the other, which would destroy theuniformity of the bag-bottom.

I claiml. In a paper-bag machine, the. main folding-blade and nger toenter and fold back the tube end, combined with the auxiliaryfeeding-blade, adapted to carry the folded paper beyond the front edgeof the main folding-blade, substantially as described.

2. The combination, in a paper-bag machine, of the finger to enter and'turn back the open end of the tube, the main folding-blade to c0-operate with the iinger and form the diamond fold, the auxiliaryfeeding-blade to carry the partially-folded bag-bottom -beyond the mainfolding-blade, the side folders or pressers to descend upon and hold thepaper in position While the main folding-blade passes partially over theside folders or pressers to operate upon and fold the tube to complete asatchelbottom, except as to its final fold, substantially as described.

3. The combination, in a paper-bag machine, of the nger to enter andturn back the open end of the tube, the main folding-blade to cooperatewith the iinger and form the diamond fold, the auxiliary feeding-bladeto carry the partially-tblded bag-bottom beyond the main folding-blade,the side folders or pressers to descend upon and hold the paper inposition while the main folding-blade passes partially over the saidside folders or pressers to operate upon and fold the tube to complete aSatchel-bottom, except as to its final fold, and the nal-folding bladeand delivering-rollers, to operate substantially .as described.

4. The side folder or presser a' and pastoboX 44, combined with thevibrating paster 42, and mechanism, substantially as described, wherebythe said paster is made to convey paste from the paste-box and apply itupon the face of the side folder or presser, substantially as described.

5. In a. paper-bag machine, thc combination, with the side folders orpresscrs, of pasting mechanism, substantially as described, to applypaste thereon, to be subsequently transferred to the cnd fold a4 of thepaper when laid over upon the upper faces of the side folders orpresscrs, substantially as described. In testimony whereof I have signedmy name to this spccitcation in the presence of two subscribingwitnesses. Y Y Y MARGARET E. KNIGHT. Witnesses HENRY A. CHAPIN, E. G. MACFARLAND.

